Elevator-lock.



W. T. DUNFORD.

ELEVATOR LOCK.

Patented Jan. 21, 1919.

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W. T. DUNFORD.

ELEVATOR LOCK.

1,291,798. APPLICATION FILED JAN. 7. I914. Patented Jan 21 2 SHEETS SHEEI 2.

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f being-understood that numerous other specific constructions not illustrated may be To alt whom it may concern:

York city,) have invented certain new and operative relation with a lock for each shaft door when the car is at the door and preservingthis condition until render the controller operative again.

the invention will become apparent as the between thelock rod and the rock shaft.

T D STATE "rA iEN OFFICE WILLIAM 'r'. bemoan, or new YORK, N; r, assrenoa, BY pmEc'r AND MESNE ASSIGN- i'rcn'iv rs, ro SHURLOC ELEVATOR SAFETY 00., Inc, A CORPORATION or NEW YORK.

ELEVATOR-LOCK.

Patented Jan. 21, 1919.

Application filed January 7, 1914. Serial No. 810,737. I

Specification of Letters Patent.

suitable or approved character, and as will be understood, in elevators driven by Be it known that I, lVILLIAM T. DUN- electric power,

roan, residin at 364 Vest 117th street, city, county, and tate of New York, (and whose post-ofiice address is World Building, New

has circuit-controlling provisions whereby the car may be started and stopped and run in either direction.

I also provide the car with mechanism, indicated generally by the reference character C, for rendering the controller inoperative. My invention is not necessarily limited to the specific character or mode of operation of this mechanism, and naturally the selection of an appropriate train of parts is within the province of the skilled mechanic. The mechanism may render the controller inoperative by looking it in neutral position, or by breaking or otherwise affect- .ing the condition of a circuit, such that it would be impossible to start the car by the controller even if the latter could be moved. I prefer, however, to do both.

Briefly describing the specific car mechanism illustrated, 13 is a slide bar, appropriately mounted and guided beneath the floor of the car, 14 is a circuit-breaker having a projecting arm 15 in the path of a projection 16 on said bar, 17 is a rock-shaft, havmg an arm 18 engaged by the slide bar, and 19 is a. lockin rod pivoted to another arm 20 on said mel -shaft and extending upward through a guide tube 21 inside the casing of 85 the controller. The upper end of this rod is normally out of operative relation to a notched part 22 on the controller lever, but when the slide-bar is moved rearward the consequent working of the shaft raises the locking rod into engagement with or into the path of said notched part. Inclined portions or ways lead to the notch so as to guide the rod into the notch and thus permit the lever to be locked when released by the operator.

The contacting part 23, preferably in the form of a vertical shoe having curved ends, is carried by the forward end of the slide bar 13, being thereby connected with or 100 forming part of the car mechanism C. This contacting-part is adapted to cooperate with other contacting parts 24 at the several landings, for the purpose of coordinating the car mechanism with the shaft gate locks.

The locking device installed in connection with the shaft gate at each landing is designated generally by the reference character L. The construction of and the spetifi me ses-.97 e ieath deu 110 useful Improvements in-Elevator-Locks, of which the following'is av specification.

. The object of this invention is to'provide means for positively insuring the locking of elevator shaft doors before the car canbe started from the respective landings. This is accomplished by providing suitable mechanism on the car for rendering the controller inoperative, and by coordinating this mechanism, that is by placing it in cothe corresponding landing, thereby causing the controller to be rendered'inoperative by the act of unlocking the door is not only shut but relocked, the operation of relocking the door, reciprocally, causing or permitting the mechanism on the car to return to normal condition, so asA to 11- other object is to guard against failure, in the case of elevators'operated by an electric motor, by causing the mechanism on the car both to lock-the controller and to break-a circuit which controls the movement of the car. A further object is to provide a construction that is'susceptible of embodiment in extremely simple form, more particularly in respect to the devices installed at the several landings. Other objects and features of specification proceeds.

The accompanying drawings illustrate a preferred embodiment of the. invention it devised for carrying the invention intoeffeet. In these viewsz= Figure 1 is a perspective viewof my elevator lock mechanism in place; Fig. 2 is a plan'view of the lock and its operating mechanism; a Fig. 3 is-a detail view showing part ofthe lock for the controller, partl in section;

Fig. 4'is a detail view 0 the connection jAn'ele'vato'r car is indicated at 10, and 11 is a door to the shaft atom of the landings. The controller '12 j in the carmay be of any I be varied. I have illustrated and prefer a body of the slide, a lock nut very simple construztion, wherein the lock casing or support 45. As shown this ,slide 1 operates transversely of the shaft gate, one

end forming the contacting part 24 and the other end being adapted to occupya posi- "tion' behind the gate soas'to' 10:1: the same closed; F or purposes of ad] ustnient the conpreferably screwed to. the

tat t part 24 is 26being pro vided to hold the adjustment;

; ;The lo':'k',' and the therewith conneeted contacting part24l," are operated automatically' upon the gatebeing completfly closed. To vthis enda spring '27 and detent 28 are provided. "The spring urges the bolt of the 10k toward' lockingposition, and the detent automatically engages the bolt (or a connected part) when the bolt is withdrawn, and holds 'it andthe contacting part 2% in this condition against the; tension of the spring. Th'eobjeLt of the detent' is to keep the controller inoperative andto prevent the bolt pressing against the door whichwould prevent the latter from moving freely. iihe door when open, however, will artto keep the'bolt andycontacting member 28 in actuated position should the detent become disengaged. The gate in; the last portion of its closing 'inovei'nent, after itsrearqedge has passed the bolt, disengages, the'd-eten't so that the bolt is free toshoot into locking position behind. the gate, this same movement restoring the contacting fpa'rt 24 'to normal position- The construitionand' arrangeinent of the detent may, "of course, be varied. As shown this slidable' in a guide re'iess in the base platetransversely to the slide 29,Whi:'h is provided with a recess '30 in its'side positioned to be engaged by the end of the detent when thelOLk is" W' ithdrawn. A spring,"3l presses against-the 'detent to urge it into. engagement with the slide, and a pin 32' projecting upward'from the detent' enables it to be released at the proper moment by a pin 33 projecting fro m the door. A cover plate, which protest and holds th slid'e and detent in jplace, hasb een omittedv fromQthe drawings-for elearness' of illustratio. I When the carfisbroughtto'ailanding'the tontactingflparts '23, 24; opposite eaeh other, though not ne e ssarily in co'nta'ct. The car mehanismirid the shaft door'lo ck are thus coordinated, and brought into-cm operative relation, so that movement of "one will cause movement of the other. The nature, location, and manner'of' conneeting the operat ng means wherewlththe 'opera r ithd ws theibelti .Of. t e" de and aturatesflieear inechanismeaia be memes varied, but in the present embodiment of the invention'such means is loated at each landing, and, as,shown,-in *ludes the-slide rod 34 on the shaft door. This rod ispivotally connected at one end with an arm on a vertical shaft 35 carried by the door adjacent its grear edge; and at the-lowerend of this shaft is an arm 36, which when'the rod--34 is sI-idtothe right presses forward against the upstanding portion 37 on the slide 29, thus moving the latter against the tension of its spring so as to withdraw'the locking portion- 25, thereby permitting 'the gateto be opened" by the'operator continuing to pushto the right-on the rod 34:. {A s ringee is provided for restoring the'shde rod'3tythe shaft'35 and the arm3 6 to normal positions-with relation to the door.

It WlllthtlS'bG seen that in the particular embodiment of the invention illustrated; the*' effort of the car operator is applied first to the shaft door lock to withdraw the same, andthis effort is transmitted to the car In'e chanismthrough the thrust ofthe contacting, member member 23. "As long as thedoor is open aiid uritil it is rntirelyjclosed and re lock'ed the parts re'main in this-condition, that is tosay, with the-door" lock withdrawn and .theeontroller inithe carrende'r'ed inopera tive. But, when thedoor-has been-entirely closed, and the oletent "28 has been-thereby disengaged" from the-slide'29, the'latter' is restored" to "gate-locking position by means of its spring, and the 'car mechanism' being no longer held byfthe contacting imember 24 is free toreturn'to'normal position. It

turn" movement "might be Caused "to positively"'restore the car mechanism, or that the latter might be provided with'a spring for" the purpose, or the' weight of" the looking "rod-1'9: maybe relied u on to return the ear-carried parts to the po'sition 'shownin Fig.1.

It will be observed that in the embodi; ment of'the invention shown thejoperating means for releasing the shaft door' lock "and actuating thecar mechanism is dist-inct'from the controller lever, and; furtherm ore, it is not necessary to bring the eontroller "le'yer to neutral position inorder to' ope'rateits locking meehanism; For; this' purposem yielding connection is provided? betweenthe locking rod 19 and the car contacting member 23, and inclined portions or {ways lead to thenotch 22', so that ifthe rod is thrust upward into locking positionwhen thecontroller isnot in neutratmid-position, it can yield downward and then spring upward into engagement with the notched part 22 when the controller 'isbrought to neutral positioni As shown-in' the drawings,- the arm 205s "loosebn the rockgishaft l'l,though itseriiivinneaemtiveto thel'aetersispreter ,4 against the contactingv its ree

- her or shoe 23 ably limited by a pin and slot, as indicated at 40, and a spring 39 is arranged as a yiel ing resilient connection between the shaft and an arm.

It is to be noted that the operator can open the door only when his car is at the landing. The height of the contact memdetermines a certain permissible range above or below the exact coincidence with the landing within which the door'can be opened. Above and below these limits the contacting member 24 is barred by rigid guards 4 1, 42, carried by the car in vertical alinement with the shoe 23, so that if an attempt is made to open the gate when the part 24, or a part of its operating mechanism, isopposite one of these guards the operator will find it impossible to move the slide rod 34L to the right so as to disengage the door lock.

While I have shown and described a suitable and preferred embodiment of my invention, I wish it to be understood that numerous changes and reversals may be made without departing from its scope.

What I claim as new is;

1. In an elevator safety system, a horizontal rigid slide at the landing mounted for movement perpendicularly to the plane of the landing door toward and from the elevator shaft, a spring for urging said slide into the path'of the door to bar the same against opening, means on the door for moving said slide inwardly of the shaft to release the door, an automatic detent at the landing for holding said slide in its inward position against the action of the spring, and means whereby the door in closing frees the slide from the detent.

2. In an elevator safety system, the combination of a rigid contact member movably mounted on the car for fore and aft movement transversely of the gap between the car and landing, a controller lock con nected therewith, a horizontal springpressed slide adjacent the landing door also movable transversely to the gap, said slide being normally in looking relation to the door and having a contact portion to cooperate with the contact member on the car, and an automatic detent adapted to hold said slide in its unlocked position and to be disengaged by the door in closing.

3. The combination with a landing door, a handle thereon, avertical rock-shaft on the door operated by said handle, a doorlocking device near the bottom of the door, means on the lower portion of the rock-shaft for displacing said device from looking position, and a contacting portion connected with said device, of a cooperative contacting member on the car, a car controller, and means connected with the said ear member for rendering said controller inoperative.

4. The combination with a landing door,

a horizontal slide rod thereon, a vertical rock-shaft connected with the end of the said slide rod, said rock-shaft mounted on the rear portion of the door, an arm on the lower end of the rock-shaft, a. spring-urged door-locking bolt on the landing in position to be acted upon by said arm, and a con' tacting portion connected with said bolt, of a cooperative contacting member on the car, a car controller, and means connected with the said ear member for rendering said controller inoperative.

5. The combination with a landing door, a spring-urged part for locking said door, an automatic detent adapted to engage an hold said part in its unlocked osition free of the door, and means where y the door disengages said detent in closing, of a carcontroller, means on the car forrendering the controller inoperative, and cooperative c contacting portions on the car and at the landing to establish operative connection between the said means on the car and the door-locking means at the landing.

6. In an elevator lock, the combination of an elevator shaft door, a lock for the same. means on the elevator car for breaking a circuit controlling the movement of the car, and mechanism including cooperative contacting portions connected respectively with said lock and circuit-breaking means for coordinating these instrumentalities.

7. The combination with an elevator shaft door and a lock for the same, of a controller in the elevator car, a lock for said controller, means on the car for breaking a circuit controlling the movement of the car, and means for connecting said controller lock and circuit-breaking means with said door look when the car is at the landing.

8. In combination with an elevator shaft door and with an elevator car having a controller and suitable mechanism for rendering the same inoperative, of a slide at the landing having a portion for locking said door and a portion cooperative with said mechanism on the car, and a detent for holding said slide when the latter is moved to unlock the door, and a spring for restoring the slide said detent being disengaged by the 115 closing of the door.

9. In combination with an elevator shaft door and with an elevator car having a controller and suitable mechanism for rendering the same inoperative, of a movable element 120 at the landing serving both as a lock for the said door and as a contacting part cooperative with the part of said mechanism on the car, a detent for holding said element when the latter is moved to unlock the door, a 12 spring ment.

.part; c,

11. The combination with an 'elevator and a train. of mechanism mechanism onthe car, a detent'it'or holding said bolt and contactingpart inshifted position, a spring for restoring them tonormal positiomsaid detent being disengaged by the closlng ofithe door, and means carried by the shaft door for actuating said contacting shaft'door, and a movable'c'ontacting part at the landing, of parts: on anelevator car comprising a controller, a'lock' for the same, a circuit-breaker, a "contactingpart cotiperalive with the contacting: part at the landing, connecting the contacting part on thecarwiththe said controller lock and with the circuit-breaker. 12. The combination With an elevator shaft door anda lock for: the same,: of a control lever in'an elevator car,'a lock for said lever, cooper'ative contacting parts connected With'said door lock andxle'verlock, respectively, meansindependentof said lever for simultaneously Withdrawing said "door lock and actuating said lever lock, and a'resilient connection'between said lever "lock and the therewith connected contacting part.

' shaft door, a lock therefor,

neenves 13-."The combination rWith an elevator connected with said lock, door for unlocking said lock and moving 14. The combination with a landing door,

a door lock having a'contacting portion cona contact :part and means on the said contacting part to operative position, of

nected therewith, and means onthe. door for operating said lock and contacting portion, of a car having a controller, meansfor: rendering the "controller inoperative, a i contacting member connected with said meansto cooperate with the other contacting portion, w

and guard means onthe car extending vertically from said'contacting member to obstruct movement of sa1d'contact1ng portion if the contacting member on the car is out of I range therewith.

In testimony whereofl havesigned my name to this specification in the two subscribing Witnesses. v

I WILLIAM T. DUNFORD. Witnesses:

J. HOWARD. BREnsn, LoUELLAf F. LITTLE.

presence of Copies of mm patent may beobtained tor zive-centa each; by addressing; the Comndamionet .oiIPMeats, i Y Washingtonian" 

